Curable resin composition, polarizing film and production process therefor, optical film, and image display device

Abstract

A curable resin composition, comprising a compound represented by the following general formula (1): wherein X is a functional group comprising a reactive group, and R 1 and R 2 each independently represent a hydrogen atom, or an aliphatic hydrocarbon group, aryl group or heterocyclic group that may have a substituent; and at least organometallic compound selected from the group consisting of metal alkoxides and metal chelates.

The invention claimed is: 
     
       1. A curable resin composition, comprising:
 a compound represented by the following general formula (1): 
 
       
         
           
           
               
               
           
         
         at least organometallic compound selected from the group consisting of a metal alkoxide and a metal chelate, 
         wherein X is a functional group comprising a reactive group, and 
         wherein R 1  and R 2  each independently represent a hydrogen atom. 
       
     
     
       2. The curable resin composition according to  claim 1 , wherein the compound represented by the general formula (1) is a compound represented by the following general formula (1′): 
       
         
           
           
               
               
           
         
         wherein Y is an organic group, and 
         wherein X, R 1  and R 2  are the same as described above in  claim 1 . 
       
     
     
       3. The curable resin composition according to  claim 1 , further comprising an active energy ray curable component; and
 wherein the reactive group of X is at least one reactive group selected from the group consisting of vinyl, (meth)acryl, styryl, (meth)acrylamide, epoxy, oxetane, and mercapto groups. 
 
     
     
       4. The curable resin composition according to  claim 1 , wherein the organometallic compound comprises titanium. 
     
     
       5. The curable resin composition according to  claim 1 , wherein the organometallic compound is a metal alkoxide, the metal alkoxide comprising an organic group having six or more carbon atoms. 
     
     
       6. The curable resin composition according to  claim 1 , wherein the organometallic compound is a metal chelate, the metal chelate comprising an organic group having four or more carbon atoms. 
     
     
       7. The curable resin composition according to  claim 1 , wherein when a cured product yielded by curing the curable resin composition is immersed in pure water of 23° C. temperature for 24 hours, the cured product shows a bulk water absorption coefficient of 10% or less by weight, the bulk water absorption coefficient being represented by the following expression:
   {( M 2− M 1)/ M 1}×100(%)
 
 wherein M1 is a weight of the cured product before the product is immersed, and 
 wherein M2 is a weight of the cured product after the product is immersed. 
 
     
     
       8. The curable resin composition according to  claim 1 , wherein the cured product yielded by curing the curable resin composition has a storage modulus of 1.0×10 7  Pa or more at 25° C. 
     
     
       9. The curable resin composition according to  claim 1 , further comprising a compound represented by the following general formula (2): 
       
         
           
           
               
               
           
         
         wherein R 3  is a hydrogen atom or a methyl group, 
         wherein R 4  and R 5  are each independently a hydrogen atom, an alkyl group, a hydroxyalkyl group, an alkoxyalkyl group or a cyclic ether group, and 
         wherein R 4  and R 5  may form a cyclic hetero-ring. 
       
     
     
       10. A polarizing film, comprising;
 a polarizer, and 
 a cured resin layer positioned on or over at least one surface of the polarizer and yielded by curing a curable resin composition, 
 wherein the curable resin composition is a curable resin composition as recited in  claim 1 . 
 
     
     
       11. The polarizing film according to  claim 10 ,
 wherein the cured resin layer is an adhesive layer, and 
 wherein a transparent protective film is laid over at least one surface of the polarizer to interpose the adhesive layer between the polarizer and the transparent protective film. 
 
     
     
       12. The polarizing film according to  claim 11 , wherein the transparent protective film has a water-vapor permeability of 5 to 70 g/m 2 . 
     
     
       13. An optical film, wherein at least one polarizing film as recited in  claim 10  is laminated. 
     
     
       14. An image display device, comprising a polarizing film as recited in  claim 10 . 
     
     
       15. A production process for a polarizing film comprising a polarizer, and a cured resin layer positioned on or over at least one surface of the polarizer and yielded by curing a curable resin composition;
 the curable resin composition being a composition comprising a compound represented by the following general formula (1): 
 
       
         
           
           
               
               
           
         
         at least organometallic compound selected from the group consisting of a metal alkoxide and a metal chelate; 
         wherein X is a functional group comprising a reactive group, and 
         wherein R 1  and R 2  each independently represent a hydrogen atom, the process comprising: 
         an applying step of applying the curable resin composition to at least one surface of the polarizer, and 
         a curing step of radiating an active energy ray to a resultant workpiece from a surface side of the workpiece on or over which the polarizer is present, or to a surface side thereof on or over which the curable resin composition is applied, to cure the curable resin composition. 
       
     
     
       16. An image display device, comprising an optical film as recited in  claim 13 .